View Metadata
Aerial Imagery for Washington County, WI 2024
- Identification Information
- Spatial Reference Information
- Data Quality Information
- Distribution Information
- Content Information
- Spatial Representation Information
- Metadata Reference Information
Identification Information
- Citation
- Title
- Aerial Imagery for Washington County, WI 2024
- Originator
- Walworth County
- Creation Date
- 2024-03-06
- Publication Date
- 2024-03-06
- Geospatial Data Presentation Form
- mapDigital
- Collection Title
- Aerial Imagery
- Other Citation Details
- Raster File Type = TIFF Bit Depth/Pixel Type = 8-bit Raster Cell Size = .25 foot Interpolation or Resampling Technique = Cubic Convolution Required Vertical Accuracy = 1.2' at 95% confidence at well defined points
- Abstract
- Ayres Associates provided the Southeastern Wisconsin Regional Planning Commission (SEWRPC) with digital, 4-band orthoimagery services in 2024 in conjunction with Wisconsin Regional Orthoimagery Consortium (WROC) in 2024. The aerial imagery was collected on: 3/6, 3/7, 3/9, 3/10, and 3/11 using an UltraCam Eagle M3 mounted in a fixed-wing aircraft. Aerial imagery was collected at 7cm ground sample distance (GSD). The resulting 3-inch pixel orthoimagery was produced to meet or exceed a horizontal accuracy of 0.70 feet RMSEr according to ASPRS Positional Accuracy Standards for Digital Geospatial Data. Resultant orthoimagery was rectified to a DEM created from LiDAR collected in 2015 and 2017. Orthoimagery was delivered in GeoTiff tiles according to SEWRPC tiling and naming scheme. The project area covers approximately 2,254 square miles and includes the counties of Ozaukee, Racine, Walworth, Washington and Waukesha. Supplemental Information: The Wisconsin Regional Orthoimagery Consortium (WROC) is a multi-entity group of county members and partners led by regional planning commissions (RPCs) and WROC representatives from Ayres Associates. The goal of the consortium is to build and sustain a multi-participant program to acquire digital orthoimagery and elevation data throughout Wisconsin. Orthoimagery was collected for SEWRPC 2024 to provide consistent deliverable products and accuracy standards for each of the participating entities.
- Purpose
- This data is intended for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. [This project established digital, 4-band orthoimagery for Southeastern Wisconsin Regional Planning Commission (SEWRPC) in conjunction with the Wisconsin Regional Orthoimagery Consortium (WROC) in 2024.]
- Supplemental Information
- This is an archived dataset held at UW-Madison.
- Temporal Extent
- Time Period
- Begin
- 2024-03-06T00:00:00
- End
- 2024-03-11T00:00:00
- Bounding Box
- West
- -88.41850868
- East
- -88.03995323
- North
- 43.5435398
- South
- 43.19212357
- ISO Topic Category
- imageryBaseMapsEarthCover
- Place Keyword
-
Washington County, Wisconsin
- Place Keyword Thesaurus
- Theme Keyword
-
Wisconsin Regional Orthoimagery Consortium (WROC)
- Theme Keyword Thesaurus
- Resource Constraints
- Use Limitation
- Although this data is being distributed by the University of Wisconsin-Madison, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials. [As directed by SEWRPC. Users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual ground conditions. Users should not use these data for critical applications without a full awareness of its limitations. Not to be used for purposes other than those strictly outlined in the 2024 WROC SEWRPC program.]
- Maintenance and Update Frequency
- notPlanned
- Language
- eng
- Credit
- Washington County, Ayres Associates, Southeastern Wisconsin Regional Planning Commission (SEWRPC)
- Point of Contact
- Contact
- Rob Merry
- Position Name
- Chief Surveyor
- Delivery Point
- PO Box 1607
- City
- Waukesha
- Administrative Area
- WI
- Postal Code
- 53187
- Country
- US
- rmerry@sewrpc.org
- Phone
- (262) 953-4289
Spatial Reference Information
- Reference System Identifier
- Code
- 7641
- Code Space
- EPSG
- Version
- 8.8(10.4.0)
Data Quality Information
- Completeness Commission
- Quantitative Attribute Accuracy Report
- Absolute External Positional Accuracy
- Lineage
- Process Step
- Description
- Ground control consisted of photo identifiable surveyed points. The imagery was collected using a Microsoft Vexcel UltraCam Eagle M3 at 7cm GSD. Image quality was verified during the post flight review phase. Factors considered during this review included, but were not limited to, the presence of cloud cover, contrails, light conditions and sun flare. A rigorous Aerotriangulation process was performed and supplemented by the photo ID survey points. The triangulated strips were rectified to a DEM created from LiDAR collected in 2015 and 2017. The imagery was mosaicked using manual seamline generation and tone/color balanced to a project-wide consistency. Custom SEWRPC named RGBN GeoTIFF tiles were extracted from the mosaic and each individual tile was reviewed for artifacts and anomalies and adjusted as part of quality control procedures. The images were reviewed for rectification problems such as bridge displacements and seamline issues caused by the underlying digital elevation model. When necessary, local corrections to the imagery were performed to minimize such effects.
- Process Date
- 2024-11-21T00:00:00
- Process Step
- Description
- Added data to the WisconsinView Data Archive (WDA).
- Process Date
- 2026-06-18T00:00:00
Distribution Information
- Format Name
- GeoTIFF
- Format Version
- 1.0
- Distributor
- UW-Madison
- Online Access
- https://web.s3.wisc.edu/wsco-wisconsinview/imagery/counties/WI/Washington/2024/
- Protocol
- Name
- Access from GeoData@Wisconsin
- Function
- download
Content Information
- Content Type
- image
Spatial Representation Information
- Raster
- Number of Dimensions
- 2
- Column Count
- 20000
- Row Count
- 20000
- Cell Geometry Type
- area
- Corner Points
- Point
- 275000.000000 140000.000000
- Point
- 275000.000000 145000.000000
- Point
- 280000.000000 145000.000000
- Point
- 280000.000000 140000.000000
- Center Point
- 277500.000000 142500.000000
Metadata Reference Information
- Hierarchy Level
- dataset
- Metadata File Identifier
- EB5A2748-E6B2-4BD1-8772-2AE61332F434
- Metadata Point of Contact
- Name
- Arthur H. Robinson Map Library
- Delivery Point
- 550 N Park St
- City
- Madison
- Administrative Area
- WI
- Postal Code
- 53706
- Country
- US
- Phone
- 608-262-1471
- Metadata Point of Contact
- Name
- Ayres Associates
- Delivery Point
- 5201 E. Terrace Dr., Suite 200
- City
- Madison
- Administrative Area
- WI
- Postal Code
- 53718
- Country
- US
- Phone
- (608) 443-1200
- Metadata Date Stamp
- 2026-06-18
- Metadata Standard Name
- ISO 19139 Geographic Information - Metadata - Implementation Specification
- Metadata Standard Version
- 2007
- Character Set
- utf8